Comparing: T57 vs. Renault FT 75 BS vs. SU-18

Experimental SPG designed on the basis of the M3A3. The T57 was developed and tested in the fall of 1942, but was never mass-produced.

The first order for an SPG on the basis of the Renault FT-17 was placed in December 1917. However, no SPG entered service until the end of World War I. After the end of the war a total of 39 vehicles were manufactured.

Self-propelled gun on the basis of the MS-1 chassis. This model only existed in blueprints, with no prototypes developed. Never entered mass production.